Investigators searched the offices of French healthcare regulator Afssaps on Thursday in connection with a case involving the anti-diabetes drug Mediator, which officials blame for at least 500 deaths in France. Judicial sources said that investigators also searched the homes of several executives of Afssaps, which is under scrutiny for allowing the sale of Mediator long after it had been pulled from the market elsewhere. Public concern about the agency has been increased by the scandal over breast implants manufactured by the now-bankrupt French company PIP.